Review on Nobsound 6P1: High-quality Vacuum Tube Power Amplifier with Stereo Class A Single-Ended Audio Amp & Headphone Amp Function by Janie Dennis

I bought this amp a while ago. As a previous reviewer pointed out, this is good for speakers as it produces a transparent and warm sound with a fairly wide soundstage, but not so good for headphones as it produces an audible hum that ruins the purity of any music. especially on soft transitions. I don't know what the source of the hum is and it doesn't appear to be related to the filter circuitry. However, if you're just listening to the speakers then this is a pretty decent amp for the price.